DrvACPI.cpp@ 91469

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1	/* $Id: DrvACPI.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* DrvACPI - ACPI Host Driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DRV_ACPI
23
24	#ifdef RT_OS_WINDOWS
25	# include <iprt/win/windows.h>
26	#endif
27
28	#include <VBox/vmm/pdmdrv.h>
29	#include <VBox/log.h>
30	#include <iprt/asm.h>
31	#include <iprt/assert.h>
32	#include <iprt/string.h>
33	#include <iprt/uuid.h>
34
35	#ifdef RT_OS_LINUX
36	# include <iprt/critsect.h>
37	# include <iprt/dir.h>
38	# include <iprt/semaphore.h>
39	# include <iprt/stream.h>
40	#endif
41
42	#ifdef RT_OS_DARWIN
43	# include <Carbon/Carbon.h>
44	# include <IOKit/ps/IOPowerSources.h>
45	# include <IOKit/ps/IOPSKeys.h>
46	# undef PVM /* This still messed up in the 10.9 SDK. Sigh. */
47	#endif
48
49	#ifdef RT_OS_FREEBSD
50	# include <sys/ioctl.h>
51	# include <dev/acpica/acpiio.h>
52	# include <sys/types.h>
53	# include <sys/sysctl.h>
54	# include <stdio.h>
55	# include <errno.h>
56	# include <fcntl.h>
57	# include <unistd.h>
58	#endif
59
60	#include "VBoxDD.h"
61
62
63	/*********************************************************************************************************************************
64	* Structures and Typedefs *
65	*********************************************************************************************************************************/
66	/**
67	* ACPI driver instance data.
68	*
69	* @implements PDMIACPICONNECTOR
70	*/
71	typedef struct DRVACPI
72	{
73	/** The ACPI interface. */
74	PDMIACPICONNECTOR IACPIConnector;
75	/** The ACPI port interface. */
76	PPDMIACPIPORT pPort;
77	/** Pointer to the driver instance. */
78	PPDMDRVINS pDrvIns;
79
80	#ifdef RT_OS_LINUX
81	/** The current power source. */
82	PDMACPIPOWERSOURCE enmPowerSource;
83	/** true = one or more batteries preset, false = no battery present. */
84	bool fBatteryPresent;
85	/** No need to RTThreadPoke the poller when set. */
86	bool volatile fDontPokePoller;
87	/** Remaining battery capacity. */
88	PDMACPIBATCAPACITY enmBatteryRemainingCapacity;
89	/** Battery state. */
90	PDMACPIBATSTATE enmBatteryState;
91	/** Preset battery charging/discharging rate. */
92	uint32_t u32BatteryPresentRate;
93	/** The poller thread. */
94	PPDMTHREAD pPollerThread;
95	/** Synchronize access to the above fields.
96	* XXX A spinlock is probably cheaper ... */
97	RTCRITSECT CritSect;
98	/** Event semaphore the poller thread is sleeping on. */
99	RTSEMEVENT hPollerSleepEvent;
100	#endif
101
102	} DRVACPI, *PDRVACPI;
103
104
105	/**
106	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
107	*/
108	static DECLCALLBACK(void ) drvACPIQueryInterface(PPDMIBASE pInterface, const char pszIID)
109	{
110	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
111	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
112
113	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
114	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIACPICONNECTOR, &pThis->IACPIConnector);
115	return NULL;
116	}
117
118	/**
119	* Get the current power source of the host system.
120	*
121	* @returns status code
122	* @param pInterface Pointer to the interface structure containing the called function pointer.
123	* @param pPowerSource Pointer to the power source result variable.
124	*/
125	static DECLCALLBACK(int) drvACPIQueryPowerSource(PPDMIACPICONNECTOR pInterface,
126	PDMACPIPOWERSOURCE *pPowerSource)
127	{
128	#if defined(RT_OS_WINDOWS)
129	RT_NOREF(pInterface);
130	SYSTEM_POWER_STATUS powerStatus;
131	if (GetSystemPowerStatus(&powerStatus))
132	{
133	/* running on battery? */
134	if ( powerStatus.ACLineStatus == 0 /* Offline */
135	\|\| powerStatus.ACLineStatus == 255 /* Unknown */
136	&& (powerStatus.BatteryFlag & 15) /* high \| low \| critical \| charging */
137	) /** @todo why is 'charging' included in the flag test? Add parenthesis around the right bits so the code is clearer. */
138	{
139	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
140	}
141	/* running on AC link? */
142	else if (powerStatus.ACLineStatus == 1)
143	{
144	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
145	}
146	else
147	/* what the hell we're running on? */
148	{
149	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
150	}
151	}
152	else
153	{
154	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
155	GetLastError()));
156	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
157	}
158
159	#elif defined (RT_OS_LINUX)
160	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
161	RTCritSectEnter(&pThis->CritSect);
162	*pPowerSource = pThis->enmPowerSource;
163	RTCritSectLeave(&pThis->CritSect);
164
165	#elif defined (RT_OS_DARWIN)
166	RT_NOREF(pInterface);
167	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
168
169	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
170	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
171
172	CFDictionaryRef pSource = NULL;
173	const void *psValue;
174	bool fResult;
175
176	if (CFArrayGetCount(pSources) > 0)
177	{
178	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
179	{
180	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
181	/* If the source is empty skip over to the next one. */
182	if(!pSource)
183	continue;
184	/* Skip all power sources which are currently not present like a
185	* second battery. */
186	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
187	continue;
188	/* Only internal power types are of interest. */
189	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
190	if ( fResult
191	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
192	{
193	/* Check which power source we are connect on. */
194	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
195	if ( fResult
196	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
197	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
198	else if ( fResult
199	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
200	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
201	}
202	}
203	}
204	CFRelease(pBlob);
205	CFRelease(pSources);
206
207	#elif defined(RT_OS_FREEBSD)
208	RT_NOREF(pInterface);
209	int fAcLine = 0;
210	size_t cbParameter = sizeof(fAcLine);
211
212	int rc = sysctlbyname("hw.acpi.acline", &fAcLine, &cbParameter, NULL, 0);
213
214	if (!rc)
215	{
216	if (fAcLine == 1)
217	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
218	else if (fAcLine == 0)
219	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
220	else
221	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
222	}
223	else
224	{
225	AssertMsg(errno == ENOENT, ("rc=%d (%s)\n", rc, strerror(errno)));
226	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
227	}
228	#else /* !RT_OS_FREEBSD either - what could this be? */
229	RT_NOREF(pInterface);
230	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
231
232	#endif /* !RT_OS_FREEBSD */
233	return VINF_SUCCESS;
234	}
235
236	/**
237	* @interface_method_impl{PDMIACPICONNECTOR,pfnQueryBatteryStatus}
238	*/
239	static DECLCALLBACK(int) drvACPIQueryBatteryStatus(PPDMIACPICONNECTOR pInterface, bool *pfPresent,
240	PPDMACPIBATCAPACITY penmRemainingCapacity,
241	PPDMACPIBATSTATE penmBatteryState,
242	uint32_t *pu32PresentRate)
243	{
244	/* default return values for all architectures */
245	pfPresent = false; / no battery present */
246	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
247	*penmRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
248	pu32PresentRate = UINT32_MAX; / present rate is unknown */
249
250	#if defined(RT_OS_WINDOWS)
251	RT_NOREF(pInterface);
252	SYSTEM_POWER_STATUS powerStatus;
253	if (GetSystemPowerStatus(&powerStatus))
254	{
255	/* 128 means no battery present */
256	*pfPresent = !(powerStatus.BatteryFlag & 128);
257	/* just forward the value directly */
258	*penmRemainingCapacity = (PDMACPIBATCAPACITY)powerStatus.BatteryLifePercent;
259	/* we assume that we are discharging the battery if we are not on-line and
260	* not charge the battery */
261	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
262	if (powerStatus.BatteryFlag & 8)
263	uBs = PDM_ACPI_BAT_STATE_CHARGING;
264	else if (powerStatus.ACLineStatus == 0 \|\| powerStatus.ACLineStatus == 255)
265	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
266	if (powerStatus.BatteryFlag & 4)
267	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
268	*penmBatteryState = (PDMACPIBATSTATE)uBs;
269	/* on Windows it is difficult to request the present charging/discharging rate */
270	}
271	else
272	{
273	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
274	GetLastError()));
275	}
276
277	#elif defined(RT_OS_LINUX)
278	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
279	RTCritSectEnter(&pThis->CritSect);
280	*pfPresent = pThis->fBatteryPresent;
281	*penmRemainingCapacity = pThis->enmBatteryRemainingCapacity;
282	*penmBatteryState = pThis->enmBatteryState;
283	*pu32PresentRate = pThis->u32BatteryPresentRate;
284	RTCritSectLeave(&pThis->CritSect);
285
286	#elif defined(RT_OS_DARWIN)
287	RT_NOREF(pInterface);
288	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
289	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
290
291	CFDictionaryRef pSource = NULL;
292	const void *psValue;
293	bool fResult;
294
295	if (CFArrayGetCount(pSources) > 0)
296	{
297	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
298	{
299	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
300	/* If the source is empty skip over to the next one. */
301	if(!pSource)
302	continue;
303	/* Skip all power sources which are currently not present like a
304	* second battery. */
305	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
306	continue;
307	/* Only internal power types are of interest. */
308	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
309	if ( fResult
310	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
311	{
312	PDMACPIPOWERSOURCE powerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
313	/* First check which power source we are connect on. */
314	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
315	if ( fResult
316	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
317	powerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
318	else if ( fResult
319	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
320	powerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
321
322	/* At this point the power source is present. */
323	*pfPresent = true;
324	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
325
326	int curCapacity = 0;
327	int maxCapacity = 1;
328	float remCapacity = 0.0f;
329
330	/* Fetch the current capacity value of the power source */
331	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSCurrentCapacityKey), &psValue);
332	if (fResult)
333	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity);
334	/* Fetch the maximum capacity value of the power source */
335	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSMaxCapacityKey), &psValue);
336	if (fResult)
337	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity);
338
339	/* Calculate the remaining capacity in percent */
340	remCapacity = ((float)curCapacity/(float)maxCapacity * PDM_ACPI_BAT_CAPACITY_MAX);
341	*penmRemainingCapacity = (PDMACPIBATCAPACITY)remCapacity;
342
343	if (powerSource == PDM_ACPI_POWER_SOURCE_BATTERY)
344	{
345	/* If we are on battery power we are discharging in every
346	* case */
347	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
348	int timeToEmpty = -1;
349	/* Get the time till the battery source will be empty */
350	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToEmptyKey), &psValue);
351	if (fResult)
352	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToEmpty);
353	if (timeToEmpty != -1)
354	/* 0...1000 */
355	pu32PresentRate = (uint32_t)roundf((remCapacity / ((float)timeToEmpty/60.0)) 10.0);
356	}
357
358	if ( powerSource == PDM_ACPI_POWER_SOURCE_OUTLET
359	&& CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSIsChargingKey), &psValue))
360	{
361	/* We are running on an AC power source, but we also have a
362	* battery power source present. */
363	if (CFBooleanGetValue((CFBooleanRef)psValue) > 0)
364	{
365	/* This means charging. */
366	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
367	int timeToFull = -1;
368	/* Get the time till the battery source will be charged */
369	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToFullChargeKey), &psValue);
370	if (fResult)
371	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToFull);
372	if (timeToFull != -1)
373	/* 0...1000 */
374	pu32PresentRate = (uint32_t)roundf((100.0-(float)remCapacity) / ((float)timeToFull/60.0)) 10.0;
375	}
376	}
377
378	/* Check for critical */
379	int criticalValue = 20;
380	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSDeadWarnLevelKey), &psValue);
381	if (fResult)
382	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &criticalValue);
383	if (remCapacity < criticalValue)
384	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
385	}
386	}
387	}
388	CFRelease(pBlob);
389	CFRelease(pSources);
390
391	#elif defined(RT_OS_FREEBSD)
392	RT_NOREF(pInterface);
393	/* We try to use /dev/acpi first and if that fails use the sysctls. */
394	bool fSuccess = true;
395	int FileAcpi = 0;
396	int rc = 0;
397
398	FileAcpi = open("/dev/acpi", O_RDONLY);
399	if (FileAcpi != -1)
400	{
401	bool fMilliWatt;
402	union acpi_battery_ioctl_arg BatteryIo;
403
404	memset(&BatteryIo, 0, sizeof(BatteryIo));
405	BatteryIo.unit = 0; /* Always use the first battery. */
406
407	/* Determine the power units first. */
408	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BIF, &BatteryIo) == -1)
409	fSuccess = false;
410	else
411	{
412	if (BatteryIo.bif.units == ACPI_BIF_UNITS_MW)
413	fMilliWatt = true;
414	else
415	fMilliWatt = false; /* mA */
416
417	BatteryIo.unit = 0;
418	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BATTINFO, &BatteryIo) == -1)
419	fSuccess = false;
420	else
421	{
422	if ((BatteryIo.battinfo.state & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
423	*pfPresent = false;
424	else
425	{
426	*pfPresent = true;
427
428	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_DISCHARG)
429	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
430	else if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CHARGING)
431	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
432	else
433	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
434
435	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CRITICAL)
436	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
437	}
438
439	if (BatteryIo.battinfo.cap != -1)
440	*penmRemainingCapacity = (PDMACPIBATCAPACITY)BatteryIo.battinfo.cap;
441
442	BatteryIo.unit = 0;
443	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BST, &BatteryIo) == 0)
444	{
445	/* The rate can be either mW or mA but the ACPI device wants mW. */
446	if (BatteryIo.bst.rate != 0xffffffff)
447	{
448	if (fMilliWatt)
449	*pu32PresentRate = BatteryIo.bst.rate;
450	else if (BatteryIo.bst.volt != 0xffffffff)
451	{
452	/*
453	* The rate is in mA so we have to convert it.
454	* The current power rate can be calculated with P = U * I
455	*/
456	*pu32PresentRate = (uint32_t)( ( ((float)BatteryIo.bst.volt/1000.0)
457	* ((float)BatteryIo.bst.rate/1000.0))
458	* 1000.0);
459	}
460	}
461	}
462	}
463	}
464
465	close(FileAcpi);
466	}
467	else
468	fSuccess = false;
469
470	if (!fSuccess)
471	{
472	int fBatteryState = 0;
473	size_t cbParameter = sizeof(fBatteryState);
474
475	rc = sysctlbyname("hw.acpi.battery.state", &fBatteryState, &cbParameter, NULL, 0);
476	if (!rc)
477	{
478	if ((fBatteryState & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
479	*pfPresent = false;
480	else
481	{
482	*pfPresent = true;
483
484	if (fBatteryState & ACPI_BATT_STAT_DISCHARG)
485	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
486	else if (fBatteryState & ACPI_BATT_STAT_CHARGING)
487	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
488	else
489	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
490
491	if (fBatteryState & ACPI_BATT_STAT_CRITICAL)
492	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
493
494	/* Get battery level. */
495	int curCapacity = 0;
496	cbParameter = sizeof(curCapacity);
497	rc = sysctlbyname("hw.acpi.battery.life", &curCapacity, &cbParameter, NULL, 0);
498	if (!rc && curCapacity >= 0)
499	*penmRemainingCapacity = (PDMACPIBATCAPACITY)curCapacity;
500
501	/* The rate can't be determined with sysctls. */
502	}
503	}
504	}
505
506	#endif /* RT_OS_FREEBSD */
507
508	return VINF_SUCCESS;
509	}
510
511	#ifdef RT_OS_LINUX
512	/**
513	* Poller thread for /proc/acpi status files.
514	*
515	* Reading these files takes ages (several seconds) on some hosts, therefore
516	* start this thread. The termination of this thread may take some seconds
517	* on such a hosts!
518	*
519	* @param pDrvIns The driver instance data.
520	* @param pThread The thread.
521	*/
522	static DECLCALLBACK(int) drvACPIPoller(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
523	{
524	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
525
526	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
527	return VINF_SUCCESS;
528
529	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
530	{
531	ASMAtomicWriteBool(&pThis->fDontPokePoller, false);
532
533	PDMACPIPOWERSOURCE enmPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
534	PRTSTREAM pStrmStatus;
535	PRTSTREAM pStrmType;
536	RTDIR hDir = NIL_RTDIR;
537	RTDIRENTRY DirEntry;
538	char szLine[1024];
539	bool fBatteryPresent = false; /* one or more batteries present */
540	bool fCharging = false; /* one or more batteries charging */
541	bool fDischarging = false; /* one or more batteries discharging */
542	bool fCritical = false; /* one or more batteries in critical state */
543	bool fDataChanged; /* if battery status data changed during last poll */
544	int32_t maxCapacityTotal = 0; /* total capacity of all batteries */
545	int32_t currentCapacityTotal = 0; /* total current capacity of all batteries */
546	int32_t presentRateTotal = 0; /* total present (dis)charging rate of all batts */
547	PDMACPIBATCAPACITY enmBatteryRemainingCapacity; /* total remaining capacity of vbox batt */
548	uint32_t u32BatteryPresentRate; /* total present (dis)charging rate of vbox batt */
549
550	int rc = RTDirOpen(&hDir, "/sys/class/power_supply/");
551	if (RT_SUCCESS(rc))
552	{
553	/*
554	* The new /sys interface introduced with Linux 2.6.25.
555	*/
556	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
557	{
558	rc = RTDirRead(hDir, &DirEntry, NULL);
559	if (RT_FAILURE(rc))
560	break;
561	if ( strcmp(DirEntry.szName, ".") == 0
562	\|\| strcmp(DirEntry.szName, "..") == 0)
563	continue;
564	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/sys/class/power_supply/%s/" n, DirEntry.szName)
565	rc = POWER_OPEN(&pStrmType, "type");
566	if (RT_FAILURE(rc))
567	continue;
568	rc = RTStrmGetLine(pStrmType, szLine, sizeof(szLine));
569	if (RT_SUCCESS(rc))
570	{
571	if (strcmp(szLine, "Mains") == 0)
572	{
573	/* AC adapter */
574	rc = POWER_OPEN(&pStrmStatus, "online");
575	if (RT_SUCCESS(rc))
576	{
577	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
578	if ( RT_SUCCESS(rc)
579	&& strcmp(szLine, "1") == 0)
580	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
581	else
582	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
583	RTStrmClose(pStrmStatus);
584	}
585	}
586	else if (strcmp(szLine, "Battery") == 0)
587	{
588	/* Battery */
589	rc = POWER_OPEN(&pStrmStatus, "present");
590	if (RT_SUCCESS(rc))
591	{
592	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
593	RTStrmClose(pStrmStatus);
594	if ( RT_SUCCESS(rc)
595	&& strcmp(szLine, "1") == 0)
596	{
597	fBatteryPresent = true;
598	rc = RTStrmOpenF("r", &pStrmStatus,
599	"/sys/class/power_supply/%s/status", DirEntry.szName);
600	if (RT_SUCCESS(rc))
601	{
602	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
603	if (RT_SUCCESS(rc))
604	{
605	if (strcmp(szLine, "Discharging") == 0)
606	fDischarging = true;
607	else if (strcmp(szLine, "Charging") == 0)
608	fCharging = true;
609	}
610	RTStrmClose(pStrmStatus);
611	}
612	rc = POWER_OPEN(&pStrmStatus, "capacity_level");
613	if (RT_SUCCESS(rc))
614	{
615	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
616	if ( RT_SUCCESS(rc)
617	&& strcmp(szLine, "Critical") == 0)
618	fCritical = true;
619	RTStrmClose(pStrmStatus);
620	}
621	rc = POWER_OPEN(&pStrmStatus, "energy_full");
622	if (RT_FAILURE(rc))
623	rc = POWER_OPEN(&pStrmStatus, "charge_full");
624	if (RT_SUCCESS(rc))
625	{
626	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
627	if (RT_SUCCESS(rc))
628	{
629	int32_t maxCapacity = 0;
630	rc = RTStrToInt32Full(szLine, 0, &maxCapacity);
631	if ( RT_SUCCESS(rc)
632	&& maxCapacity > 0)
633	maxCapacityTotal += maxCapacity;
634	}
635	RTStrmClose(pStrmStatus);
636	}
637	rc = POWER_OPEN(&pStrmStatus, "energy_now");
638	if (RT_FAILURE(rc))
639	rc = POWER_OPEN(&pStrmStatus, "charge_now");
640	if (RT_SUCCESS(rc))
641	{
642	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
643	if (RT_SUCCESS(rc))
644	{
645	int32_t currentCapacity = 0;
646	rc = RTStrToInt32Full(szLine, 0, &currentCapacity);
647	if ( RT_SUCCESS(rc)
648	&& currentCapacity > 0)
649	currentCapacityTotal += currentCapacity;
650	}
651	RTStrmClose(pStrmStatus);
652	}
653	rc = POWER_OPEN(&pStrmStatus, "power_now");
654	if (RT_FAILURE(rc))
655	rc = POWER_OPEN(&pStrmStatus, "current_now");
656	if (RT_SUCCESS(rc))
657	{
658	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
659	if (RT_SUCCESS(rc))
660	{
661	int32_t presentRate = 0;
662	rc = RTStrToInt32Full(szLine, 0, &presentRate);
663	if ( RT_SUCCESS(rc)
664	&& presentRate > 0)
665	{
666	if (fDischarging)
667	presentRateTotal -= presentRate;
668	else
669	presentRateTotal += presentRate;
670	}
671	}
672	RTStrmClose(pStrmStatus);
673	}
674	}
675	}
676	}
677	}
678	RTStrmClose(pStrmType);
679	#undef POWER_OPEN
680	}
681	RTDirClose(hDir);
682	}
683	else /* !/sys */
684	{
685	/*
686	* The old /proc/acpi interface
687	*/
688	/*
689	* Read the status of the powerline-adapter.
690	*/
691	rc = RTDirOpen(&hDir, "/proc/acpi/ac_adapter/");
692	if (RT_SUCCESS(rc))
693	{
694	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/ac_adapter/%s/" n, DirEntry.szName)
695	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
696	{
697	rc = RTDirRead(hDir, &DirEntry, NULL);
698	if (RT_FAILURE(rc))
699	break;
700	if ( strcmp(DirEntry.szName, ".") == 0
701	\|\| strcmp(DirEntry.szName, "..") == 0)
702	continue;
703	rc = POWER_OPEN(&pStrmStatus, "status");
704	if (RT_FAILURE(rc))
705	rc = POWER_OPEN(&pStrmStatus, "state");
706	if (RT_SUCCESS(rc))
707	{
708	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
709	{
710	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
711	if (RT_FAILURE(rc))
712	break;
713	if ( strstr(szLine, "Status:") != NULL
714	\|\| strstr(szLine, "state:") != NULL)
715	{
716	if (strstr(szLine, "on-line") != NULL)
717	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
718	else
719	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
720	break;
721	}
722	}
723	RTStrmClose(pStrmStatus);
724	break;
725	}
726	}
727	RTDirClose(hDir);
728	#undef POWER_OPEN
729	}
730
731	/*
732	* Read the status of all batteries and collect it into one.
733	*/
734	rc = RTDirOpen(&hDir, "/proc/acpi/battery/");
735	if (RT_SUCCESS(rc))
736	{
737	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/battery/%s/" n, DirEntry.szName)
738	bool fThisBatteryPresent = false;
739	bool fThisDischarging = false;
740
741	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
742	{
743	rc = RTDirRead(hDir, &DirEntry, NULL);
744	if (RT_FAILURE(rc))
745	break;
746	if ( strcmp(DirEntry.szName, ".") == 0
747	\|\| strcmp(DirEntry.szName, "..") == 0)
748	continue;
749
750	rc = POWER_OPEN(&pStrmStatus, "status");
751	/* there is a 2nd variant of that file */
752	if (RT_FAILURE(rc))
753	rc = POWER_OPEN(&pStrmStatus, "state");
754	if (RT_FAILURE(rc))
755	continue;
756
757	PRTSTREAM pStrmInfo;
758	rc = POWER_OPEN(&pStrmInfo, "info");
759	if (RT_FAILURE(rc))
760	{
761	RTStrmClose(pStrmStatus);
762	continue;
763	}
764
765	/* get 'present' status from the info file */
766	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
767	{
768	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
769	if (RT_FAILURE(rc))
770	break;
771	if (strstr(szLine, "present:") != NULL)
772	{
773	if (strstr(szLine, "yes") != NULL)
774	{
775	fThisBatteryPresent = true;
776	break;
777	}
778	}
779	}
780
781	if (fThisBatteryPresent)
782	{
783	fBatteryPresent = true;
784	RTStrmRewind(pStrmInfo);
785
786	/* get the maximum capacity from the info file */
787	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
788	{
789	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
790	if (RT_FAILURE(rc))
791	break;
792	if (strstr(szLine, "last full capacity:") != NULL)
793	{
794	char *psz;
795	int32_t maxCapacity = 0;
796	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &maxCapacity);
797	if (RT_FAILURE(rc))
798	maxCapacity = 0;
799	maxCapacityTotal += maxCapacity;
800	break;
801	}
802	}
803
804	/* get the current capacity/state from the status file */
805	int32_t presentRate = 0;
806	bool fGotRemainingCapacity = false;
807	bool fGotBatteryState = false;
808	bool fGotCapacityState = false;
809	bool fGotPresentRate = false;
810	while ( ( !fGotRemainingCapacity
811	\|\| !fGotBatteryState
812	\|\| !fGotCapacityState
813	\|\| !fGotPresentRate)
814	&& pThread->enmState == PDMTHREADSTATE_RUNNING)
815	{
816	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
817	if (RT_FAILURE(rc))
818	break;
819	if (strstr(szLine, "remaining capacity:") != NULL)
820	{
821	char *psz;
822	int32_t currentCapacity = 0;
823	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &currentCapacity);
824	if ( RT_SUCCESS(rc)
825	&& currentCapacity > 0)
826	currentCapacityTotal += currentCapacity;
827	fGotRemainingCapacity = true;
828	}
829	else if (strstr(szLine, "charging state:") != NULL)
830	{
831	if (strstr(szLine + 15, "discharging") != NULL)
832	{
833	fDischarging = true;
834	fThisDischarging = true;
835	}
836	else if (strstr(szLine + 15, "charging") != NULL)
837	fCharging = true;
838	fGotBatteryState = true;
839	}
840	else if (strstr(szLine, "capacity state:") != NULL)
841	{
842	if (strstr(szLine + 15, "critical") != NULL)
843	fCritical = true;
844	fGotCapacityState = true;
845	}
846	if (strstr(szLine, "present rate:") != NULL)
847	{
848	char *psz;
849	rc = RTStrToInt32Ex(RTStrStripL(&szLine[13]), &psz, 0, &presentRate);
850	if (RT_FAILURE(rc))
851	presentRate = 0;
852	fGotPresentRate = true;
853	}
854	}
855	if (fThisDischarging)
856	presentRateTotal -= presentRate;
857	else
858	presentRateTotal += presentRate;
859	}
860	RTStrmClose(pStrmStatus);
861	RTStrmClose(pStrmInfo);
862	}
863	RTDirClose(hDir);
864	#undef POWER_OPEN
865	}
866	} /* /proc/acpi */
867
868	/* atomic update of the state */
869	RTCritSectEnter(&pThis->CritSect);
870
871	/* charging/discharging bits are mutual exclusive */
872	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
873	if (fDischarging)
874	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
875	else if (fCharging)
876	uBs = PDM_ACPI_BAT_STATE_CHARGING;
877	if (fCritical)
878	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
879
880	if (maxCapacityTotal > 0 && currentCapacityTotal > 0)
881	{
882	if (presentRateTotal < 0)
883	presentRateTotal = -presentRateTotal;
884
885	/* calculate the percentage */
886
887	enmBatteryRemainingCapacity =
888	(PDMACPIBATCAPACITY)( ( (float)currentCapacityTotal
889	/ (float)maxCapacityTotal)
890	* PDM_ACPI_BAT_CAPACITY_MAX);
891	u32BatteryPresentRate =
892	(uint32_t)(( (float)presentRateTotal
893	/ (float)maxCapacityTotal) * 1000);
894	}
895	else
896	{
897	/* unknown capacity / state */
898	enmBatteryRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
899	u32BatteryPresentRate = ~0;
900	}
901
902	if ( pThis->enmPowerSource == enmPowerSource
903	&& pThis->fBatteryPresent == fBatteryPresent
904	&& pThis->enmBatteryState == (PDMACPIBATSTATE) uBs
905	&& pThis->enmBatteryRemainingCapacity == enmBatteryRemainingCapacity
906	&& pThis->u32BatteryPresentRate == u32BatteryPresentRate)
907	{
908	fDataChanged = false;
909	}
910	else
911	{
912	fDataChanged = true;
913
914	pThis->enmPowerSource = enmPowerSource;
915	pThis->fBatteryPresent = fBatteryPresent;
916	pThis->enmBatteryState = (PDMACPIBATSTATE)uBs;
917	pThis->enmBatteryRemainingCapacity = enmBatteryRemainingCapacity;
918	pThis->u32BatteryPresentRate = u32BatteryPresentRate;
919	}
920
921	RTCritSectLeave(&pThis->CritSect);
922
923	if (fDataChanged)
924	pThis->pPort->pfnBatteryStatusChangeEvent(pThis->pPort);
925
926	/* wait a bit (e.g. Ubuntu/GNOME polls every 30 seconds) */
927	ASMAtomicWriteBool(&pThis->fDontPokePoller, true);
928	rc = RTSemEventWait(pThis->hPollerSleepEvent, 20000);
929	}
930
931	return VINF_SUCCESS;
932	}
933
934	static DECLCALLBACK(int) drvACPIPollerWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
935	{
936	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
937
938	RTSemEventSignal(pThis->hPollerSleepEvent);
939	if (!ASMAtomicReadBool(&pThis->fDontPokePoller))
940	RTThreadPoke(pThread->Thread);
941	return VINF_SUCCESS;
942	}
943	#endif /* RT_OS_LINUX */
944
945
946	/**
947	* Destruct a driver instance.
948	*
949	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
950	* resources can be freed correctly.
951	*
952	* @param pDrvIns The driver instance data.
953	*/
954	static DECLCALLBACK(void) drvACPIDestruct(PPDMDRVINS pDrvIns)
955	{
956	LogFlow(("drvACPIDestruct\n"));
957	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
958
959	#ifdef RT_OS_LINUX
960	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
961	if (pThis->hPollerSleepEvent != NIL_RTSEMEVENT)
962	{
963	RTSemEventDestroy(pThis->hPollerSleepEvent);
964	pThis->hPollerSleepEvent = NIL_RTSEMEVENT;
965	}
966	RTCritSectDelete(&pThis->CritSect);
967	#endif
968	}
969
970	/**
971	* Construct an ACPI driver instance.
972	*
973	* @copydoc FNPDMDRVCONSTRUCT
974	*/
975	static DECLCALLBACK(int) drvACPIConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
976	{
977	RT_NOREF(fFlags);
978	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
979	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
980	int rc = VINF_SUCCESS;
981
982	/*
983	* Init the static parts.
984	*/
985	pThis->pDrvIns = pDrvIns;
986	#ifdef RT_OS_LINUX
987	pThis->hPollerSleepEvent = NIL_RTSEMEVENT;
988	#endif
989	/* IBase */
990	pDrvIns->IBase.pfnQueryInterface = drvACPIQueryInterface;
991	/* IACPIConnector */
992	pThis->IACPIConnector.pfnQueryPowerSource = drvACPIQueryPowerSource;
993	pThis->IACPIConnector.pfnQueryBatteryStatus = drvACPIQueryBatteryStatus;
994
995	/*
996	* Validate the config.
997	*/
998	if (!CFGMR3AreValuesValid(pCfg, "\0"))
999	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
1000
1001	/*
1002	* Check that no-one is attached to us.
1003	*/
1004	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
1005	("Configuration error: Not possible to attach anything to this driver!\n"),
1006	VERR_PDM_DRVINS_NO_ATTACH);
1007
1008	/*
1009	* Query the ACPI port interface.
1010	*/
1011	pThis->pPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIACPIPORT);
1012	if (!pThis->pPort)
1013	{
1014	AssertMsgFailed(("Configuration error: the above device/driver didn't export the ACPI port interface!\n"));
1015	return VERR_PDM_MISSING_INTERFACE_ABOVE;
1016	}
1017
1018	#ifdef RT_OS_LINUX
1019	/*
1020	* Start the poller thread.
1021	*/
1022	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pPollerThread, pThis, drvACPIPoller,
1023	drvACPIPollerWakeup, 0, RTTHREADTYPE_INFREQUENT_POLLER, "ACPI Poller");
1024	if (RT_FAILURE(rc))
1025	return rc;
1026
1027	rc = RTCritSectInit(&pThis->CritSect);
1028	if (RT_FAILURE(rc))
1029	return rc;
1030
1031	rc = RTSemEventCreate(&pThis->hPollerSleepEvent);
1032	#endif
1033
1034	return rc;
1035	}
1036
1037
1038	/**
1039	* ACPI driver registration record.
1040	*/
1041	const PDMDRVREG g_DrvACPI =
1042	{
1043	/* u32Version */
1044	PDM_DRVREG_VERSION,
1045	/* szName */
1046	"ACPIHost",
1047	/* szRCMod */
1048	"",
1049	/* szR0Mod */
1050	"",
1051	/* pszDescription */
1052	"ACPI Host Driver",
1053	/* fFlags */
1054	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1055	/* fClass. */
1056	PDM_DRVREG_CLASS_ACPI,
1057	/* cMaxInstances */
1058	~0U,
1059	/* cbInstance */
1060	sizeof(DRVACPI),
1061	/* pfnConstruct */
1062	drvACPIConstruct,
1063	/* pfnDestruct */
1064	drvACPIDestruct,
1065	/* pfnRelocate */
1066	NULL,
1067	/* pfnIOCtl */
1068	NULL,
1069	/* pfnPowerOn */
1070	NULL,
1071	/* pfnReset */
1072	NULL,
1073	/* pfnSuspend */
1074	NULL,
1075	/* pfnResume */
1076	NULL,
1077	/* pfnAttach */
1078	NULL,
1079	/* pfnDetach */
1080	NULL,
1081	/* pfnPowerOff */
1082	NULL,
1083	/* pfnSoftReset */
1084	NULL,
1085	/* u32EndVersion */
1086	PDM_DRVREG_VERSION
1087	};

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source: vbox/trunk/src/VBox/Devices/PC/DrvACPI.cpp@ 91469

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